2 //===----------------------------------------------------------------------===//
4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5 // See https://llvm.org/LICENSE.txt for license information.
6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
8 //===----------------------------------------------------------------------===//
10 #ifndef _LIBCPP_STOP_TOKEN
11 #define _LIBCPP_STOP_TOKEN
16 // [stoptoken], class stop_token
19 // [stopsource], class stop_source
22 // no-shared-stop-state indicator
23 struct nostopstate_t {
24 explicit nostopstate_t() = default;
26 inline constexpr nostopstate_t nostopstate{};
28 // [stopcallback], class template stop_callback
29 template<class Callback>
36 #if _LIBCPP_HAS_THREADS
38 # if _LIBCPP_STD_VER >= 20
39 # include <__stop_token/stop_callback.h>
40 # include <__stop_token/stop_source.h>
41 # include <__stop_token/stop_token.h>
46 # if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
47 # pragma GCC system_header
50 #endif // _LIBCPP_HAS_THREADS
52 #if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
57 #endif // _LIBCPP_STOP_TOKEN